books.google.com - An apparatus involving a fundamental idea of air sedimentation has been adapted to fractionate radiological fallout samples and measure their radioactivity. This paper describes the principle involved, its limitations, and many of the characteristics of the apparatus. A discussion is included on the...https://books.google.com/books/about/Measurement_of_Radioactive_Fallout_Air_S.html?id=r6KSw7NR66wC&utm_source=gb-gplus-shareMeasurement of Radioactive Fallout Air Sedimentation Apparatus